package com.snake.mylibrary.db_provider;



public class DBConfig {
    /*数据库名字*/
    public static final String DB_NAME = "snake.db";
    /*版本号*/
    public static final int DB_VERSION = 1;
    public static final String NAME1 = "name1";
    public static final String NAME2 = "name2";
    public static final String NAME3 = "name3";
    /*数据库表*/
    public static final String CREATE_TABLE_NAME1 = "create table if not exists "+NAME1+"("
            + "_id integer primary key,"
            + "name varchar(10),"
            + "age integer)";
    public static final String CREATE_TABLE_NAME2 = "create table if not exists "+NAME2+"("
            + "_id integer primary key,"
            + "name varchar(10),"
            + "age integer)";
    public static final String CREATE_TABLE_NAME3 = "create table if not exists "+NAME3+"("
            + "_id integer primary key,"
            + "name varchar(10),"
            + "age integer)";



    /*选择：select * from table1 where 范围
    插入：insert into table1(field1,field2) values(value1,value2)
    删除：delete from table1 where 范围
    更新：update table1 set field1=value1 where 范围
    查找：select * from table1 where field1 like ’%value1%’ ---like的语法很精妙，查资料!
    排序：select * from table1 order by field1,field2 [desc]
    总数：select count as totalcount from table1
    求和：select sum(field1) as sumvalue from table1
    平均：select avg(field1) as avgvalue from table1
    最大：select max(field1) as maxvalue from table1
    最小：select min(field1) as minvalue from table1*/



}
